Source-code search guides

Field notes on reverse-searching the web by source code. Every guide is built around real queries you can run against our ~95M-domain index — each one gives you the footprint and the search that uses it.

Comparison June 17, 2026 · 2 min read PublicWWW alternatives, tested with real queries The landscape for source-code and technology search — what each tool is actually for, tested on the same three real footprints. Lead gen April 28, 2026 · 2 min read Build technographic lead lists from JavaScript fingerprints Every tool a site runs leaves a fingerprint in its source. Turn 'uses X but not Y' into a targeted, current prospect list you export yourself. OSINT March 11, 2026 · 2 min read Connect domains by a shared tracking ID Analytics, ad, and pixel IDs are unique per owner but reused across their sites. Pivoting on them is how investigators unmask domain networks. E-commerce January 22, 2026 · 2 min read Find Shopify stores that use Klaviyo One boolean query intersects two footprints and hands you a clean list of Shopify stores running Klaviyo — a ready-made prospect list. Regex December 9, 2025 · 2 min read Regex search over website source code When a literal string won't do, regex matches patterns — ID formats, versioned CDN paths, inline config. A cookbook of patterns that work. OSINT November 18, 2025 · 2 min read Find every site running the same Facebook (Meta) Pixel A Meta Pixel ID links the sites that share an ad account. Search the ID and you map the network behind a campaign. Analytics · OSINT October 20, 2025 · 2 min read Find websites that share a Google Analytics ID Two sites that report to the same Analytics property are almost always run by the same person. Search the ID string and the hidden network falls out. WordPress September 15, 2025 · 2 min read Find every website using a WordPress plugin A WordPress plugin loads its assets from a fixed folder. Search that path and you get a live list of the sites running it — with the source to prove it. Basics August 12, 2025 · 2 min read How to search the source code of the web Source-code search finds pages by what's in their HTML, CSS, and JavaScript — not by words on the page. Here's how it works and when to use it.